Chevron Pascagoula Refinery

Capability

Crude distillation 356,440 bpd operable, 356,440 operating (EIA-820, as of 2026-01-01). Downstream units below, barrels per calendar day.

Production capacity · barrels per stream day

Crude slate

Historically heavy sour crude imported from Latin America/Mexico/South America; since Jan-Feb 2026 an increasing share of Venezuelan heavy sour crude, one of the few Gulf Coast slates that can run it.

Base oils

Operating. MDEQ's Final Determination for the Pascagoula Aggregates PSD Project (Facility No. 1280-00058, PER20250001, March 12, 2026) describes Plant 81A (Residuum Desulfurization Unit Module A / Lube Hydrocracker) processing VGO ahead of Plant 82 (Base Oil) with four furnaces serving the Isodewaxing and Hydrofinishing processes, and says base oil production is expected to increase as the refinery debottlenecks crude throughput from 361,000 to 394,000 b/d. A Group III+ (NEXBASE 4 XP) addition announced March 2025 targets commercial production in Q4 2026. Logistics modes: MDEQ permit (truck loading at the Marketing Terminal followed by wharf facilities; four marine terminals); Lube Report (2011-02-02) lists rail, pipeline, truck, barge and ship access at the site. Chevron's own Pascagoula site (pascagoula.chevron.com) returned HTTP 403.

Process route

Hydrocracking + catalytic dewaxing, Hydroisomerization

Feedstock

Internal vacuum gas oil

Brands

Chevron Base Oils (Neutral Oil 60R/100R/220R/600R), NEXBASE (Group III+: NEXBASE 4 XP from Q4 2026)

Ships by

truck, rail, barge, vessel

Owners

Chevron Corporation 100%

Grades offered

Base oil events and projects

1. 2026-03-12 Other Group II

   MDEQ issued its Final Determination of Approval (March 12, 2026) for Chevron's 'Pascagoula Aggregates PSD Project' (Facility No. 1280-00058, PER20250001): debottlenecking Crude I (Plant 11), Crude II (Plant 61), Hydrofiner (Plant 22) and RDS Module A / Lube Hydrocracker (Plant 81A) to raise crude throughput from 361,000 to 394,000 b/d with no new emission units; the permit says VGO production will increase and be processed in Plant 81A then Plant 82 (Base Oil), so base oil production is expected to increase, affecting the four Isodewaxing/Hydrofinishing furnaces (CK-003 to CK-006). The permit does not describe a Group III+ unit or give a base oil capacity. WLOX reported the PSD application and public hearing (Jan. 22, 2026) on Jan. 19, 2026. announced 2026-01-19 · actual 2026-03-12 Mississippi Department of Environmental Quality high

2. 2025-12-02 Posted price change Group II

   Chevron lowered Group II posted prices effective Dec. 2, 2025: 100R down 30 cents/gal, 220R and 600R down 35 cents/gal, 'to reflect current market conditions' (company-wide posting covering Pascagoula and Richmond grades). actual 2025-12-02 Lubes'n'Greases high

3. 2025-03-11 Expansion Group III+ pascagoula-group-iii-plus

   Chevron said on Tuesday (March 11, 2025, per the March 12 Lube Report; Argus also dated 12 March 2025) it will add Group III+ production capability at Pascagoula, one 4 cSt cut marketed as NEXBASE 4 XP, aiming to scale up commercial production by Q4 2026 and to be the first significant Group III+ source outside Asia, supplied globally starting with European hubs. Capacity, method and cost were not disclosed; capacity_delta is 0 for that reason. Target recorded as 2026-12 (end of the stated Q4 2026). announced 2025-03-11 · public target 2026-12 Lubes'n'Greases high

4. 2019-06-24 Conversion Group II+

   Chevron Products Company announced it would begin Group II+ production at Pascagoula and Richmond (100R upgraded to Group II+ quality, 220R Noack lowered) via a processing scheme designed with Chevron Lummus Global catalyst technology. Pre-2020 event kept because it establishes the Group II+ grade at Pascagoula. F+L Daily (Fuels & Lubes) high

Not established from public sources: The 25,000 b/d Group II figure is the plant's long-standing design capacity as repeated by Chevron to trade press (2011, 2013, 2025); Chevron's own Pascagoula pages returned HTTP 403, and the MDEQ 2026 permit does not state a base oil capacity. Group III+ capacity, process changes and cost were not disclosed by Chevron, and officials declined to say whether Group III+ displaces Group II; the MDEQ 1280-00058 Final Determination covers crude-throughput debottlenecking only and does not describe a Group III+ unit, so no permit for the Group III+ project was found. Group II+ (100R) share of the 25,000 b/d is not split. Plant attribution of 100R/220R/600R rests on the 2013 Lube Report (Pascagoula makes 60, 100, 220, 600 Group II grades, the 60 neutral only at Pascagoula) and the spec sheet's US Gulf Coast availability column; the sheet itself does not name plants and gives no API group for 60R (recorded as Group II per the 2013 article). viscosity_cst_100c for 100R and 600R are midpoints of spec ranges. Logistics modes other than truck and marine (MDEQ) come from a 2011 pre-start-up article. No outage, turnaround or force majeure for the base oil plant since 2020 was found in free pages. The 2014 commercial start-up date was not confirmed from a page opened (2013 article expected commercial sales in Q1 2014). 1 value is held back because only a paid source supports it.

Crude in & products out

Docks

The docks at this facility and, where a ship agent or port publishes it, the largest vessel each berth takes. Channel conditions change; these figures are a guide, not clearance to sail.

Chevron Pascagoula Refinery wharf · crude in, products out

• Owned by Chevron U.S.A. Inc.
• Crude arrives by marine tanker. Chevron describes the tankers as 800 feet long.
• The marine terminal also has berths to load refined products. About 65 percent of refinery products leave by ship or barge.
• The 2026 state permit names Berths 1 through 6 and 8 at the wharf and counts four marine terminals at the refinery.
• Vacuum gas oil moves by barge or by ship.

Source: Chevron Pascagoula Refinery website ; Mississippi DEQ permit to construct, 12 March 2026, read 2026-10-11.

Chevron petroleum coke storage and ship loading at the wharf · products out

• Owned by Chevron U.S.A. Inc. (Plant 33, Coke Conveyor and Storage).
• Petroleum coke moves from the coker on a two-mile enclosed conveyor to storage piles near the wharf.
• Coke is loaded from the storage area to ships at the wharf.

Source: Mississippi DEQ permit to construct, 12 March 2026, read 2026-10-11.

Pipeline reach

By water

Substitutes

Other refineries injecting into the same pipelines — the supply that could backfill an outage here.

Events

1. 2026-03-12 Other Group II

   MDEQ issued its Final Determination of Approval (March 12, 2026) for Chevron's 'Pascagoula Aggregates PSD Project' (Facility No. 1280-00058, PER20250001): debottlenecking Crude I (Plant 11), Crude II (Plant 61), Hydrofiner (Plant 22) and RDS Module A / Lube Hydrocracker (Plant 81A) to raise crude throughput from 361,000 to 394,000 b/d with no new emission units; the permit says VGO production will increase and be processed in Plant 81A then Plant 82 (Base Oil), so base oil production is expected to increase, affecting the four Isodewaxing/Hydrofinishing furnaces (CK-003 to CK-006). The permit does not describe a Group III+ unit or give a base oil capacity. WLOX reported the PSD application and public hearing (Jan. 22, 2026) on Jan. 19, 2026. source

2. 2026-02 other

   Chevron significantly increased processing of Venezuelan heavy sour crude at Pascagoula following the easing of Venezuela-related restrictions after Maduro's capture; Pascagoula is one of a limited number of Gulf Coast refineries (alongside New Orleans, Lake Charles, Port Arthur, Houston, and Corpus Christi facilities) configured for that heavy, sour slate. source

3. 2025-12-02 Posted price change Group II

   Chevron lowered Group II posted prices effective Dec. 2, 2025: 100R down 30 cents/gal, 220R and 600R down 35 cents/gal, 'to reflect current market conditions' (company-wide posting covering Pascagoula and Richmond grades). source

4. 2025-03-11 Expansion Group III+

   Chevron said on Tuesday (March 11, 2025, per the March 12 Lube Report; Argus also dated 12 March 2025) it will add Group III+ production capability at Pascagoula, one 4 cSt cut marketed as NEXBASE 4 XP, aiming to scale up commercial production by Q4 2026 and to be the first significant Group III+ source outside Asia, supplied globally starting with European hubs. Capacity, method and cost were not disclosed; capacity_delta is 0 for that reason. Target recorded as 2026-12 (end of the stated Q4 2026). source

5. 2021-05-12 outage

   Chevron stated its Pascagoula refining operations were unaffected by the Colonial Pipeline ransomware outage and that it continued shipping fuel to its customer network. source

6. 2019-06-24 Conversion Group II+

   Chevron Products Company announced it would begin Group II+ production at Pascagoula and Richmond (100R upgraded to Group II+ quality, 220R Noack lowered) via a processing scheme designed with Chevron Lummus Global catalyst technology. Pre-2020 event kept because it establishes the Group II+ grade at Pascagoula. source